public class Test1 {
    public static void main(String[] args) {
        System.out.println("hello");
        System.out.println("hello");
        Integer n1 = 100;
        Integer n2 = 100;
        Integer n3;
        String n4 ="200";
        String n5 ="200";
        System.out.println(n1==n2);
        System.out.println(n1.equals(n2));
        System.out.println(n4.equals(n5));
    }
}
